When I upgraded from a Tivo S3 to a Roamio Pro and Mini, I noticed a visible reduction in image quality. Many of my 1080i channels looked soft and blurry compared to the crisp output from the old S3. Doing some investigation with an HDMI video capture card, I figure out what was happening.
The Roamio and Mini are incorrectly inverting the top/bottom fields of an interlaced 1080i signal. Here are some examples of what I'm seeing:
Zoomed Tivo Mini on top. Zoomed Tivo S3 on bottom:
Original Mini frame:
Original Tivo S3 frame:
When you look at thin horizontal edges at the top/bottom of the letters, you see that they are flipped vertically. If you were to swap them, you would end up with the same clean image as the S3.
I've seen this problem from many of my FIOS 1080i channels. Example is from 870 SHO2PHD. Also seen on 600 CNNHD and others.
If anyone would like to reproduce this problem or has any engineering contacts at Tivo, I have uploaded a sample recording that you can transfer back to your DVR using Tivo Desktop software:
http://ift.tt/1M0orH6 (Click "Download This File")
Be sure to set your Tivo output to 1080i. The issue is harder to see in 1080p or 720p.
The Roamio and Mini are incorrectly inverting the top/bottom fields of an interlaced 1080i signal. Here are some examples of what I'm seeing:
Zoomed Tivo Mini on top. Zoomed Tivo S3 on bottom:
Original Mini frame:
Original Tivo S3 frame:
When you look at thin horizontal edges at the top/bottom of the letters, you see that they are flipped vertically. If you were to swap them, you would end up with the same clean image as the S3.
I've seen this problem from many of my FIOS 1080i channels. Example is from 870 SHO2PHD. Also seen on 600 CNNHD and others.
If anyone would like to reproduce this problem or has any engineering contacts at Tivo, I have uploaded a sample recording that you can transfer back to your DVR using Tivo Desktop software:
http://ift.tt/1M0orH6 (Click "Download This File")
Be sure to set your Tivo output to 1080i. The issue is harder to see in 1080p or 720p.
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